diff options
| -rw-r--r-- | arch/arm64/Kconfig | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 6f199d8146d4..77d5fa96f9d0 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1610,6 +1610,25 @@ config ARM64_BTI BTI, such binaries can still run, but you get no additional enforcement of branch destinations. +config ARM64_BTI_KERNEL + bool "Use Branch Target Identification for kernel" + default y + depends on ARM64_BTI + depends on ARM64_PTR_AUTH + depends on CC_HAS_BRANCH_PROT_PAC_RET_BTI + depends on !CC_IS_GCC || GCC_VERSION >= 100000 + depends on !(CC_IS_CLANG && GCOV_KERNEL) + depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_REGS) + help + Build the kernel with Branch Target Identification annotations + and enable enforcement of this for kernel code. When this option + is enabled and the system supports BTI all kernel code including + modular code must have BTI enabled. + +config CC_HAS_BRANCH_PROT_PAC_RET_BTI + # GCC 9 or later, clang 8 or later + def_bool $(cc-option,-mbranch-protection=pac-ret+leaf+bti) + config ARM64_E0PD bool "Enable support for E0PD" default y |